All posts by Maciej Piotrowski

Shrinking the size of a monorepo

The source code of Allegro iOS app for buyers used to be divided into separate modules hosted in multiple repositories (polyrepo). The source code was migrated to a monorepo a few years back along with the history of all repos that constituted the app. Updating source code of a module on one repository could affect another module hosted on a separate repository. Versioning modules and propagation of dependency update led to long release process of the entire application. Our main repository for the iOS application thus became our monorepo. After 9 years of development of the app the repo size has grown enormously and the git clone command became a nightmare taking too much time. We had a possibility to shrink the project size during the migration from an on-premise to an external git repo hosting provider.

Speeding up warm builds in Xcode

Programmers who have ever developed software for Apple platforms in the early days of Swift language might remember ridiculous times it took to compile the whole project. For large and complicated codebase times used to range from 10 up to 40 minutes. Over the years our toolset has improved alongside with compilation times, but slow build times of source code can still be a nightmare.

Maciej Piotrowski

macpiotrowski89 maciejpiotrowski89

Maciej is a passionate iOS developer that pays much attention to details and code quality. He likes improving things, always looking for better solutions because he’s amazed that in programming world issues can be solved in 100s of ways.